Tire Size Finder (optional):
Stock Sizes
- 255/75-16
Plus Sizes
- 255/75-16
Accepts P-Metric and Inches
| 425/65-22.5 | 445/50-22.5 | Difference | |
|---|---|---|---|
| Diameter inches (mm) | 44.25 (1124) | 40.02 (1016.5) | -4.23 (-107.5) -9.6% |
| Width inches (mm) | 16.73 (425) | 17.52 (445) | 0.79 (20) 4.7% |
| Circum. inches (mm) | 139.02 (3531.15) | 125.73 (3193.43) | -13.3 (-337.72) -9.6% |
| Sidewall Height inches (mm) | 10.88 (276.25) | 8.76 (222.5) | -2.12 (-53.75) -19.5% |
| Revolutions per mile (km) | 455.76 (283.19) | 503.95 (313.14) | 48.2 (29.95) 10.6% |
Speedometer Difference
| Speedo Reading | Actual Speed |
|---|---|
| 20 mph (32.19 km/h) | 18.09 mph (29.11 km/h) |
| 25 mph (40.23 km/h) | 22.61 mph (36.39 km/h) |
| 30 mph (48.28 km/h) | 27.13 mph (43.66 km/h) |
| 35 mph (56.33 km/h) | 31.65 mph (50.94 km/h) |
| 40 mph (64.37 km/h) | 36.17 mph (58.22 km/h) |
| 45 mph (72.42 km/h) | 40.7 mph (65.49 km/h) |
| 50 mph (80.47 km/h) | 45.22 mph (72.77 km/h) |
| 55 mph (88.51 km/h) | 49.74 mph (80.05 km/h) |
| 60 mph (96.56 km/h) | 54.26 mph (87.33 km/h) |
| 65 mph (104.61 km/h) | 58.78 mph (94.6 km/h) |
| 70 mph (112.65 km/h) | 63.31 mph (101.88 km/h) |
| 75 mph (120.7 km/h) | 67.83 mph (109.16 km/h) |
| 80 mph (128.75 km/h) | 72.35 mph (116.43 km/h) |
| 85 mph (136.79 km/h) | 76.87 mph (123.71 km/h) |
| 90 mph (144.84 km/h) | 81.39 mph (130.99 km/h) |
| 95 mph (152.89 km/h) | 85.91 mph (138.27 km/h) |
| 100 mph (160.93 km/h) | 90.44 mph (145.54 km/h) |
| 2.35 | 2.73 | 2.94 | 3.07 | 3.21 | 3.31 | 3.42 | 3.55 | 3.73 | 3.91 | 4.11 | 4.27 | 4.56 | 4.88 | 5.13 | 5.29 | 5.38 | 5.71 | 6.17 | 7.17 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1282 | 1490 | 1604 | 1675 | 1752 | 1806 | 1866 | 1937 | 2036 | 2134 | 2243 | 2330 | 2489 | 2663 | 2800 | 2887 | 2936 | 3116 | 3367 | 3913 |
Better Fuel Economy Factory Ratios Increased Power
